In general, the extent of partially coalesced fat decreased and
melt rate increased as protein content increased, although some
differences among protein type were found. In particular, whey
proteins (from procream or WPI) were most effective at reducing
partial coalescence, perhaps due to their action at the oil-water
interface. Even low levels of procream were enough to completely
prevent the formation of partially coalesced fat. This reduction in
fat globule clustering allowed the melting serum to flow quickly
and completely through the screen in the melt test, resulting in rapid melt rate. In general, melt rate was inversely proportional to
the extent of fat destabilization. These results show that the protein
content of ice cream can be increased, but at the expense of various
attributes, particularly related to fat destabilization and melt-down
rates.
In general, the extent of partially coalesced fat decreased and
melt rate increased as protein content increased, although some
differences among protein type were found. In particular, whey
proteins (from procream or WPI) were most effective at reducing
partial coalescence, perhaps due to their action at the oil-water
interface. Even low levels of procream were enough to completely
prevent the formation of partially coalesced fat. This reduction in
fat globule clustering allowed the melting serum to flow quickly
and completely through the screen in the melt test, resulting in rapid melt rate. In general, melt rate was inversely proportional to
the extent of fat destabilization. These results show that the protein
content of ice cream can be increased, but at the expense of various
attributes, particularly related to fat destabilization and melt-down
rates.
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